Is it permissible for men to wear platinum rings if they are silver-plated?

Women can only wear gold and silver rings. A man can wear a ring which is silver plated. A man is allowed to wear a silver ring with the provision that its weight does not exceed 1 Mithqaal (4.374 grams) of silver. By virtue of of the silver plating, permission is granted to wear such a ring. However, one should still observe the weight restriction of 4.374 grams.